Evidence map›Paper›PMID 33307170›Full record

ArticleBrain, behavior, and immunity2021

Lipoteichoic acid, a cell wall component of Gram-positive bacteria, induces sleep and fever and suppresses feeding.

Éva Szentirmai, Ashley R Massie, Levente Kapás

Open access · greenAbstract read
In one paragraph

Article in Brain, behavior, and immunity, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
1.8field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 60 citations in OpenAlex.

  1. Sleep duration, selected circulating biomarkers, and colorectal cancer risk.European journal of cancer prevention : the official journal of the European Cancer Prevention Organisation (ECP) · 2026
    Article
  2. Article
  3. The cycle of infectious fever - how it affects bacterial infections.Frontiers in cellular and infection microbiology · 2026
    Review
  4. Article
  5. Article
  6. Article
  7. Metabolic signals in sleep regulation: the role of brown adipose tissue.Neurobiology of sleep and circadian rhythms · 2025
    Article
  8. Article
  9. Review
  10. Article
  11. Post-weaning diarrhea caused by F18Microbiome research reports · 2025
    Review
  12. Microbiome-Based Therapeutics for Insomnia.International journal of molecular sciences · 2024
    Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. Review
  18. Article
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  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Éva SzentirmaiElson S. Floyd College of Medicine, Department of Biomedical Sciences, Washington State University, Spokane, WA, United States; Sleep and Performance Research Center, Washington State University, Spokane, WA, United States. Electronic address: eszentirmai@wsu.edu.
Ashley R MassieElson S. Floyd College of Medicine, Department of Biomedical Sciences, Washington State University, Spokane, WA, United States.
Levente KapásElson S. Floyd College of Medicine, Department of Biomedical Sciences, Washington State University, Spokane, WA, United States; Sleep and Performance Research Center, Washington State University, Spokane, WA, United States.
Washington State University Spokane · US

Funding

Brown Adipose Tissue and Sleep RegulationR01HL122390 · NHLBI · WASHINGTON STATE UNIVERSITY · PI SZENTIRMAI, EVA · 2015 to 2019
$1.9M
Novel mechanism in microbiota-brain communication: the role of the hepatoportal regionR01HL151853 · NHLBI · WASHINGTON STATE UNIVERSITY · PI KAPAS, LEVENTE, SZENTIRMAI, EVA · 2020 to 2023
$1.5M
NHLBI NIH HHS R01 HL122390NHLBI NIH HHS R01 HL151853
6 · The paper itself

Abstract

Fragments of the bacterial cell wall are bioactive microbial molecules that have profound effects on the function of the brain. Some of the cell wall constituents are common to both Gram-positive and Gram-negative bacteria, e.g., peptidoglycans, while other cell wall components are specific to either Gram-positive or Gram-negative microbes. Lipopolysaccharide (LPS), also called endotoxin, is found exclusively in Gram-negative bacteria, while lipoteichoic acid (LTA) is specific to Gram-positive bacteria. The effects of peptidoglycans, their fragments, and LPS are well characterized, they induce sleep, fever and anorexia. In the present study, we investigated the sleep, body temperature and food intake modulating effects of LTA. We found that intraperitoneal injection of 100 and 250 μg LTA from B. subtilis and S. aureus increases non-rapid-eye movement sleep (NREMS) in mice. The effects were dose-dependent, and the changes were accompanied by decreased motor activity and feeding as well as febrile responses. Intraperitoneal injection of 10 μg LTA induced monophasic increases in body temperature, while 100 and 250 μg LTA from B. subtilis induced initial hypothermia followed by fever. Treatment with 250 μg LTA from S. aureus elicited monophasic hypothermia. Administration of 300 μg/kg LTA from S. aureus directly into the portal vein elicited similar sleep responses in rats but did not affect body temperature. The sleep-modulating effects of LTA were similar to that of LPS in mice, although LTA appears to be less potent. These findings suggest that the role of LTA in signaling by Gram-positive bacteria in the host body is analogous to the role of LPS/endotoxin in signaling by Gram-negative microbes. LTA may play a role in the development of sickness response in clinically manifest Gram-positive bacterial infections and may contribute to sleep signaling by the commensal intestinal microbiota.

Indexed as

LipopolysaccharidesStaphylococcus aureusAnimalsAnti-Bacterial AgentsCell WallGram-Negative BacteriaGram-Positive BacteriaMiceRatsSleepTeichoic AcidsAnti-Bacterial AgentsLipopolysaccharideslipoteichoic acidTeichoic AcidsBody temperatureElectroencephalogramFood intakeIndirect calorimetryIntraportal injectionLPSMicrobiotaSickness responseSleepTeichoic acid

Identifiers

PMID33307170
PMCPMC7897295
OpenAlexW3113354896

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.